'Impossible' to check every shipping container

"It's just not possible" to check every shipping container that enters this country for people, the head of a human trafficking charity told Good Morning Britain.

Andrew Wallis, chief executive of Unseen, said the only way to prevent cases like that of the 35 Afghani Sikhs found in a container at Tilbury Docks is to improve the circumstances for people in "source countries."

Mr Wallis said half a billion containers get shipped around the world every day.